Hundreds still missing after Brazil dam collapse

What is the primary focus of the first section?

• The importance of video tutorials

• How to 'Turn off'

• The meaning of 'No one'

• The concept of Zoom

Which term is discussed in the second section?

• Zoom

• Video tutorials

• No one

• Turn off

What is the main topic of the second section?

• Explaining 'Turn off'

• Understanding 'No one'

• Overview of video tutorials

• Introduction to Zoom

What does the third section explain?

• The benefits of online learning

• The phrase 'Turn off'

• The meaning of 'No one'

• The concept of Zoom

Which section covers the phrase 'Turn off'?

• Second section

• None of the sections

• First section

• Third section